promethium

/pruh-mee-thee-uhm/US // prəˈmi θi əm //UK // (prəˈmiːθɪəm) //

钷,原锂,锂,钷钷

Definitions

n.名词 noun

1
Chemistry.
- : a rare-earth, metallic, trivalent element. Symbol: Pm; atomic number: 61.